FREQUENCY-DOMAIN DIRECT PARAMETER-IDENTIFICATION FOR MODAL-ANALYSIS - STATE-SPACE FORMULATION

被引：41

作者：

LEMBREGTS, F

LEURIDAN, J

VANBRUSSEL, H

机构：

[1] Leuven Measurement and Systems, B-3030 Leuven

[2] Department of Mechanical Engineering, Katholieke Universiteit Leuven, B-3030 Leuven

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 1990年 / 4卷 / 01期

关键词：

D O I：

10.1016/0888-3270(90)90041-I

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper outlines the theoretical development of a modal identification technique for the dynamic behaviour of linear time-invariant systems. Using a state space formulation for the equations of motion for a mechanical structure, an algorithm is developed to identify its state transition matrix from measured multiple input/multiple output relations (frequency response functions). From the identified matrix quantities, it is possible to derive a modal model of natural frequencies, damping values, mode shapes and modal participation factors. Aspects of data reduction via singular value analysis are discussed to extract valid state variables from the entire set of response stations. Emphasis is put on the application of this frequency domain direct parameter identification technique for the analysis of non-uniformly sampled frequency response functions, as generated for example when automated stepped-sine excitation is applied for modal testing of mechanical structures. © 1990.

引用

页码：65 / 75

页数：11

共 17 条

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[2] Allemang, Investigation of some multiple input/output frequency response function experimental modal analysis techniques, Ph.D. Dissertation, (1980)
[3] Rost, Leuridan, A comparison of least squares and total least squares for multiple input estimation of frequency response functions, American Society of Mechanical Engineers, Paper No. 85-DET-105, (1985)
[4] Gimenez, Carrascosa, Global fitting. An efficient method of experimental modal analysis of mechanical structures, Proceedings of the First International Modal Analysis Conference, pp. 528-533, (1982)
[5] Vold, Kundrat, Rocklin, Russell, Society of Automotive Engineers, Paper No. 820194, A multi-input modal estimation algorithm for mini-computers, (1982)
[6] Van Der Auweraer, Development and evaluation of advanced measurement methods for experimental modal analysis. Ph.D. Dissertation, K. U. Leuven, Belgium, Dept. of Mechanical Engineering, Ph.D. Dissertation, (1987)
[7] Lembregts, Sas, Van Der Auweraer, Leuridan, Integrated stepped-sine system for modal analysis, Mechanical Systems and Signal Processing, 1, pp. 415-424, (1987)
[8] Lembregts, Leuridan, Lipkens, Van Der Auweraer, Comparison of stepped-sine and broad band excitation to an aircraft frame, Proceedings of the Sixth International Modal Analysis Conference, pp. 1706-1713, (1988)
[9] Turunen, Statistical performance of modal parameter estimation methods, Proceedings of the Fifth International Modal Analysis Conference, pp. 26-36, (1987)
[10] Leuridan, Some direct parameter model identification methods applicable for multiple input modal analysis, Ph.D. Dissertation, (1984)

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